Ugh...My 400's Engine

[Markopolo400]

Well...I think the pictures speak for themselves...Kinda.

My 400 is getting completely rebuilt after it started making a funny tinking sound...

Everything is getting replace in the valve train, along with the piston, and the cam chain.

Is all the wear on the exhaust cam normal?

Man I wish I had a 250 smoker right about now...Haha.

[dwnlowx]

wow did you find your problem

[Markopolo400]

Not sure exactly what it was yet...Hoping that it was either the cam chain, or the valves.

The ex valves were super tight when I took it apart, and I'm hoping that's what it was. If it's not I don't know what I'll do. ?

[Birdy426]

Check the primary drive nut...they have been known to come loose...

[TD-3]

The exhaust cam journal closest to the gear looks completely worn out ?

I would guess that is why your valves clearance was tight.

[grayracer513]

The exhaust cam journal closest to the gear looks completely worn out

I would guess that is why your valves clearance was tight.

If you are speaking of the area between the sprocket and ball bearing on the one side, and the cam lobe on the other, that isn't a cam journal. It's just the shaft. Nothing runs against it. ?